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Finding the Fourth Proportional to 220,702.72, 330,973.44 and 80,419.84

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Solution

The fourth proportional to 220,702.72, 330,973.44 and 80,419.84 is: 120,600.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,702.72 : 330,973.44 = 80,419.84 : x
  2. Step 2: Convert to fraction form
    220,702.72/330,973.44 = 80,419.84/x
  3. Step 3: Cross multiply
    220,702.72x = 330,973.44 × 80,419.84
  4. Step 4: Simplify right side
    220,702.72x = 26,616,831,089.05
  5. Step 5: Solve for x
    x = 26,616,831,089.05/220,702.72
  6. Step 6: Final answer
    x = 120,600.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.